[homebrew] rust 1.73.0 failed to build on 12-arm

[chenrui333]

We've got a weird error while trying to upgrade rust to 1.73.0. The error seems only happened in 12-arm build:

  thread 'main' panicked at 'could not read dir "/private/tmp/rust-20231026-5378-1tb0p4o/rustc-1.73.0-src/build/aarch64-apple-darwin/stage0/lib/rustlib/aarch64-apple-darwin/codegen-backends": Os { code: 2, kind: NotFound, message: "No such file or directory" }', lib.rs:1714:25

Some host toolchain:

Clang: 14.0.0 build 1400
macOS: 12.6.3-arm64

full build log, https://github.com/Homebrew/homebrew-core/actions/runs/6660485676/job/18101828627?pr=149754
relates to Homebrew/homebrew-core#149754

[chenrui333]

Any takes on this? Thanks!

[Bo98]

This regressed in bb8c497 but it appears to have been fixed in amongst the various bundled fixes of db3e2ba#diff-5a1e05f2688d271039171a547d407d0c8a96715ee64d35562fc76b4c9a874303L595.

It is not clear to me why it only failed on macOS 12 (earlier versions untested), but it does seem to be fixed now.

If possible, it might be worth backporting the small relevant part of that change to beta.

[chenrui333]

on top of what @Bo98 said, we have incorporated the build patch in Homebrew/homebrew-core#154526

(gonna close this issue now)